#include<stdio.h>
#include<stdlib.h>
int main()
{
	char a[20];
	gets_s(a);
	int i = 0;
	for (i = 0; a[i]!= 0; i++)
	{
		if (a[i] >= 'A' && a[i] <= 'Z')
			a[i] = a[i] + 32;
		else
			- 1;
	}
	printf("%s", a);
	return 0;
}